//package chapter9;
//
//import java.security.KeyStore;
//import java.security.PrivateKey;
//import java.security.cert.Certificate;
//import java.security.cert.X509Certificate;
//import java.util.Arrays;
//
//import org.bouncycastle.cms.CMSEnvelopedData;
//import org.bouncycastle.cms.CMSEnvelopedDataGenerator;
//import org.bouncycastle.cms.CMSProcessable;
//import org.bouncycastle.cms.CMSProcessableByteArray;
//import org.bouncycastle.cms.RecipientId;
//import org.bouncycastle.cms.RecipientInformation;
//import org.bouncycastle.cms.RecipientInformationStore;
//
///**
// * Demonstrate creation and processing a public key recipient enveloped-message.
// */
//public class KeyTransEnvelopedDataExample {
//    public static void main(String[] args)
//            throws Exception {
//        KeyStore credentials = Utils.createCredentials();
//        PrivateKey key = (PrivateKey) credentials.getKey(Utils.END_ENTITY_ALIAS, Utils.KEY_PASSWD);
//        Certificate[] chain = credentials.getCertificateChain(Utils.END_ENTITY_ALIAS);
//        X509Certificate cert = (X509Certificate) chain[0];
//
//        // set up the generator
//        CMSEnvelopedDataGenerator gen = new CMSEnvelopedDataGenerator();
//
//        gen.addKeyTransRecipient(cert);
//
//        // create the enveloped-data object
//        CMSProcessable data = new CMSProcessableByteArray("Hello World!".getBytes());
//
//        CMSEnvelopedData enveloped = gen.generate(
//                data,
//                CMSEnvelopedDataGenerator.AES128_CBC, "BC");
//
//        // recreate
//        enveloped = new CMSEnvelopedData(enveloped.getEncoded());
//
//        // look for our recipient identifier
//        RecipientId recId = new RecipientId();
//
//        recId.setSerialNumber(cert.getSerialNumber());
//        recId.setIssuer(cert.getIssuerX500Principal().getEncoded());
//
//        RecipientInformationStore recipients = enveloped.getRecipientInfos();
//        RecipientInformation recipient = recipients.get(recId);
//
//        if (recipient != null) {
//            // decrypt the data
//            byte[] recData = recipient.getContent(key, "BC");
//
//            // compare recovered data to the original data
//            if (Arrays.equals((byte[]) data.getContent(), recData)) {
//                System.out.println("data recovery succeeded");
//            } else {
//                System.out.println("data recovery failed");
//            }
//        } else {
//            System.out.println("could not find a matching recipient");
//        }
//    }
//}